<template>
  <el-container class="home_con">
    <!-- //头部 -->
    <el-header>
      <div>
        <img src="../assets/logo.png" alt width="50px">
        <span>后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <el-container>
      <!-- 左侧导航栏 -->
      <el-aside :width="isCollapse?'64px':'200px'">
        <div class="toggle-button" @click="toggleC">| | |</div>
        <el-menu
          background-color="#7a7979"
          text-color="#fff"
          active-text-color="#400EFF"
          unique-opened
          :collapse="isCollapse"
          :collapse-transition="false"
          :router="true"
          :default-active="activePath"
        >
          <!-- 一级菜单 -->
          <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id" >
            <!-- 一级菜单 模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id"
            @click="saveNavState('/'+subItem.path)">
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 主体部分 -->
      <el-main>
          <!-- 路由占位符 -->
          <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      // 左侧菜单数据
      menulist: [],
      iconsObj: {
        '125': 'el-icon-s-custom',
        '103': 'el-icon-message-solid',
        '101': 'el-icon-s-shop',
        '102': 'el-icon-s-order',
        '145': 'el-icon-s-marketing'
      },
      // 是否折叠
      isCollapse: false,
     //被激活得链接地址
      activePath:''
    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有菜单
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
      console.log(res)
    },
    toggleC() {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接激活状态
    saveNavState(activePath){
        window.sessionStorage.setItem('activePath',activePath)
        this.activePath = activePath;
    }
  }
}
</script>

<style scoped>
.home_con {
  height: 100%;
}
.el-header {
  background-color: #2c2b2b;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.el-header div {
  display: flex;
  align-items: center;
}
.el-header div img {
  border-radius: 50px;
}
.el-header div span {
  margin-left: 10px;
  color: aliceblue;
  font-size: 20px;
}
.el-aside {
  background-color: #7a7979;
}
.el-menu {
  border: none;
}
.el-main {
  background-color: #ccc;
}
.toggle-button {
  background-color: #494949d3;
  text-align: center;
  color: aliceblue;
  height: 25px;
  line-height: 25px;
  cursor: pointer;
}
</style>

